带电子聚焦的氧化锌场发射背光源  

Electron focused ZnO field emission backlight unit

作　　者：赵丽芳[1] 狄云松[2] 

机构地区：[1]南京信息职业技术学院,江苏南京210023 [2]南京师范大学物理科学与技术学院,江苏南京210023

出　　处：《液晶与显示》2015年第1期64-69,共6页Chinese Journal of Liquid Crystals and Displays

基　　金：国家自然基金项目(No.61101023);中国博士后科学基金面上项目(No.2013M541584)

摘　　要：液晶显示需要低功耗、均匀度好的光源作为背光源。为了降低功耗,提高显示图像质量,未来的液晶显示需要实现对背光源进行时间与阵列调制。对比现有的液晶显示用背光源,研究制备了氧化锌场发射光源。该光源采用氧化锌纳米针作为场发射阴极,采用平面栅极作为门电极调制结构实现亮度的连续可调,通过带有氧化镁二次电子发射层的金属栅网对电子进行聚焦实现光源的均匀照度。实验结果表明,带电子聚焦的氧化锌场发射光源具有较低的开启场强(1.1V/μm),较小的电压调制区间(小于150V),较高的发光强度(大于1 000cd/m2),且基于电子聚焦结构的设计,实现了光源的均匀稳定照度,可以提高液晶显示的图像质量。带电子聚焦结构的氧化锌场发射光源,既可实现对发光的时间与阵列调制,同时能提高发光的均匀性,将可作为液晶显示的理想背光源。Liquid Crystal Display requires low power consumption,good uniformity of light as a backlight.In order to reduce power consumption and improve the quality of the display image,the future of Liquid Crystal Display backlight needs to realize that time and array can be modulated.Compared with conventional Liquid Crystal Display backlight,zinc oxide field emission backlight has been researched.In this field emission backlight,zinc oxide nanostructure has been taken on as field emission cathode,aplanar gate structure to achieve luminance modulation,a metal grid with magnesium secondary electron emitting layer as a focus electrode to achieve uniform illumination.The results showed that a zinc oxide field emission backlight with a focus electrode having a low turn-on field（1.1V/μm）,a relative small voltage modulation range（less than 150V）,a high luminous intensity（greater than 1 000cd/m2）,and the electron focusing structure design would achieve a uniform and stable illumination,which could improve the image quality of the liquid crystal display.With this zinc oxide electron focused field emission backlight,the light emission from backlight could be modulated by time and array independence,while the uniformity of light emission could also be improved,zinc oxide electron focused field emission backlight would be ideal as the LCD backlight.

关 键 词：背光源 氧化锌 场发射 电子聚焦 平面栅极 

分 类 号：O462.4[理学—电子物理学]